Ian01 wrote on May 20
th, 2019 at 10:35pm:
Never call back to an unexpected missed call from an unrecognised number. If it was important they will call back later or leave a message
It depends on your personality type.
As long as you establish that the number you are calling is not going to cost you anything and is not some covert premium rate or directory enquiries number then you may still want to establish who the call was from in case it was from.
However calling back all numbers that call you indiscriminately without checking out the likely call charges is not a good idea.
These days the majority of the most undesirable callers in overseas scamming call centres cannot in any case be called back because they have spoofed an apparently legitimate but in fact non existent UK CLI number despite being thousands of miles away in India (mainly) or the Philippinnes (only very occasionally where scams are involved).